Don't send keepalive logger message if we've already disconnected

Spigot-Server-Patches/Increase-time-allowed-for-a-keepalive-reply.patch

@@ -10,7 +10,7 @@ tempermental due to lag spikes on the network thread, e.g. that caused
 by plugins that are interacting with netty.
 
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index 26fbb30f9..5bb6d9fac 100644
+index 26fbb30f9..71fae9450 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
 @@ -0,0 +0,0 @@ public class PlayerConnection implements PacketListenerPlayIn, ITickable {
@@ -33,7 +33,7 @@ index 26fbb30f9..5bb6d9fac 100644
 +        long elapsedTime = currentTime - this.getLastPing();
 +        if (this.isPendingPing()) {
 +            // We're pending a ping from the client
-+            if (elapsedTime >= 30000L) { // 30 seconds for a ping reply
++            if (!this.processedDisconnect && elapsedTime >= 30000L) { // 30 seconds for a ping reply also, don't fire if already disconnected
 +                PlayerConnection.LOGGER.warn("{} was kicked due to keepalive timeout!", this.player.getName()); // more info
 +                this.disconnect(new ChatMessage("disconnect.timeout"));
 +            }